Vacuum



E. M. DAVIDS AND L. LINDSAY.

VACUUM AIR SEPARATOR.

APPLICATION FILED JAN. 6, 1919.

1,309,879, Patented July 15, 1919.

I N VEN TORS ATTORNEYS W. TNESS:

ERNEST M. D

Angeles, Angeles and vented new and Vacuum Air-Separators, of which the fol- 'fication. Our invention relates to separators and consists of the novel features herein shown, described and claimed.

lowing 1s a spec-1 Specifically the to make a vacuum air separator for handling very light powered material such as talcum.

Broadly,

may be applied to separators ore and any granular material desired to separate the fine from] the coarse. diagrammatic elevation of Figure 1 is a a separator embodying and adapted invention an in:- like.

.i r". looking in the arrow .2 in Fig. Fig. 3 is an Fig. 1

Fig.

section on. the Fig. 7 is a on the line. 7-7 of p to the drawings in detail, the

Referring funnel-shaped outer shell 1 to a horizontal intake pipe 2 by an elbow 3. The ground material comes from the grinding mill to the feeder 5 and is its lower end feeder 5 through end of the outer shell 1. 1f the air circulation is stopped thematerial wardly through the spout and downwardly through first take-off spout 7 The spout 7 extends vertically downwardly from the of the elbow 3.

mounted on the spout 7 upon. a

the principles of our'invention 2 1s a fragmentary direction indicated by the 1. enlarged fragmentary sec tional detail on a plane parallel with Fig. 1 and on the line 3-3 o is an enlarged looking in the direction indicated by the arrows 4 in Figs. 1 and 5.

5 is a fragmentary detail on a plane parallelwlth Fig. 1 and on the lines 55 of Figs. 2 and .4.

Fig. 6 is an enlarged fra mentary vertical lines fragmentary sectional detail AVIDS, 0F TROIPICO,

CALIFORNIA.

AIR-SEPARATOR.

VACUUM A.1\TD LYCUBIGUS LINDSAY,

PATENT @FFTGE.

0F LOS ANGELES,

Patented July 115, 11919.

Application filed January 6, 1919. Serial No. 259,921.

pivot 9,

f the in the county of Los California, have inuseful improvements in object of our invention is for handling where it is the principles of our for handling talcum,

top plan view opened.

f Fig. 2.

fragmentary plan vertical I sectional 6-6 of Fig. 7.

Fig. 6.

is connected at rim 22.

will pass down- 6 to the elbow 3 the elbow 3 to the lower end A swinging valve 8 is horizontal horizontally an mounted upo Weight 11 bei 9 to its closed position. coming down from valve 9 overbalances n the ar An inner shell 12 outer shell 1 so as to f0 tween the inner and out shell 12 is more flaring 1 so as to reduce the horizontal cross sectional area of the ch tom upwardly. A second is connected 'to the lower shell 12 and extends downwardly and laterally through the there being an overbalanced gravity valve 15 in the spout 1 1. The the valve 15 is mounted pivot 17 so swings to a position spout the spout that when the valve blade swings to a position parallel with the passage the passage is 19 extends horizontally that when- An arm and at right angles f pivot 17, and a weig mounted upon the arm 1 ing the weight 20 the operation 0 15 may be regulated.

An annular rim from the top of the outer end annular rim 22 exten the top of the inner shell 12, 22 being in a horizontal p chamber 23 between t closes the chamber 25 wi An annular battle wardly from the cover 24: conc nings 27 are formed thr said openings bei all the way aroun upwardly through the the extension chamber 23 105 will pass inwardly through the openings 27 and if there is suilicient force the material t thebaffle 26 and fall An adte 28 is arranged to con- 1 Ope the rim 22, spaced apart material passing chamber 13 and will strike agains downwardly into the chamber 25. justable swinging ga an arm 10 extends from the pivot 9 d an adjustable weight 11 is m 10', the force of the ng exerted to swi the wall of the outer passage 18 is ng the valve When the material elbow 3 upon the the weight 11 the valve will swi'ng open and let the material pass. is mounted within the rm a chamber 3 beer shells. The inner than theoutcr shell amber 13 from the bottake-ofl spout 14: end of the inner shell 1,

valve blade 16 of upon a horizontal the valve blade 16 diagonally across the closed, and sov rom one end of the ht 20 is adju-stably 9, so that by adjustf the valve nd closes the extension he rims 21 and 22 and thin the inner shell 26 extends downentric to the 100 ough ng evenly d, so that 21 extends upwardly shell 1, and a secds upwardly from the rims 21 and lane concentric to each other, thereby forming a chamber 23 serving as an extension of the chamber 13. A cover 2d is secured to the upper edge of the annular rim 21 a leading I p take pipe 34 extending to a posltlon above the cover 24. An elbow 35 leads downwardly from the'pipe 34, and a nipple 36 leads downwardly from the elbow 35' and 1s fixed through the cover 24 at the axial center 'erly assembled and within the pipe of the cover. pipe nipple 37 telescopes and 39 are connected to the lower end of the nipple 37 and extend upwardly outside of the nipple 36'through bearings 40 and '41 mounted upon the cover-24, and have handles 42 and 43 upon their upper ends. Set

to the third take-off spout 29. The. adjustable swinging gate 46 consistsef a plate 47 mounted upon a pivot 48, an-arm 49 extend ing from the pivot 48 at right angles to the pivot and in the same direction as the plate 47, and the sector 50 mounted upon the cover to be engaged by the arm 49, so thatthe location of the plate 47 maybe readily seen by the position of the arm 49 upon the sector 50, and so that the position may be changed by moving the arm 49. The adjustable swinging gate 28'is constructed in the same way as the adjustable swinging gate 46. A manhole construction 51 provides access through the cover 24 to the chamber 25. In the practical operation the suction fan 31 is started after the parts have been proproportioned to produce a vacuum of about our ounces to the square inch in the intake pipe 2. The air passing inwardly through the pipe 2 and upwardly through the elbow 3 to the meet the pulverized material coming downwardly through the spout 6 from the feeder 5, and the lighter particles Will pass upwardly into the chamber '13, and the heavier particles will pass downwardly to the gravity valve 8. Normally the valve 8 is held closed by the weight 11 to prevent air pass ing upwardly through the spout 7. When a sufficient quantity of the heavier/particles are accumulated upon the valve San increase of the accumulation will cause the valve to open and discharge the surplus downwardly discharge pipe 32 nipple36' and extends downwardly into the chamber 25. Hand rods 38 next lig chamber 13 will I velocity of the air passing upwardly through Y the chamber 13 will-carry the lighter particles through the openings 27' and inwardly against the bafiie 26. The gates of the valves 28 are all turned'in the material 'passing'inwardly through the openings 27 will be deflected by the gates,

the same direction, and

and the adjustment of the gates'will regulate to some extent the fineness of the material which passes through the openings 27. This operation will cause a centrifugal circulation of the air and material in the extension chamber 23, thereby causingthe heavier par= ticles to fly outwardly against the inner face of the rim 21, and these heavy particles will strike the plate47 and be deflated outwardly and fall down the spout 29. The gravity valve 30 keeps the passage in the spout 29 closed until sufiicient material falls upon the valve to overcome the balance of the valve and open the valve.

The material passing through the openings .27 against the baflle 26 will fall downwardly into the chamber 25, and the fine talcum, or the like, will pass upwardly through the pipe 34 to the suction fan 31 and dust collector 3'3, and the grade of this fine material may be accurately regulated by adjusting the nipple 37 u and down The material which passes into the chamber 25 and which is not fine enough to go to the settling chamber 33 as finished material will pass downwardly to the valve 15, and ultimately pass through the spout 14.

-The separator shown and described will produce four grades of material: The heavier grade passlngthrough the spout 7, and hter grade passin through the spout 29, the third lighter gra e passing through the 'spoutl14, and the finished material pass:

Various changes may be made without departing from the spirlt of our invention as clalmed. 1

We claim:

1. A separator comprising a funnelshaped outer shell; means for discharging material into thebottom of the outer shell;

an elbow extending downwardly from the bottom of the outer shell; a spout extending downwardly from the bottom of the elbow; an air intake leading horizontally into the bottom of the elbow; an inner funnel-shaped shell concentrically mounted in the outer funnel-shaped shell and forming a chamber between the two shells; a take-01f spout leading from the bottom of the second funnelshaped shell downwardly and outwardly tending downwardly through the first shell; rims extending upwardly from the inner and outer shells and forming an extension chamber, therebeing openings through extension chamber; said openings being evenly spaced apart around the shell; adjustable swinging ga es arranged in the openings, the gates all pointing in the same direction; a cover fitting upon baffle extending downwardly from the cover concentric to the inner rim; a suction pipe extending downwardly through the cover concentric to the battle; a suction fan connected to the suction pipe; a spout leading outwardly and downwardly through the outer rim; and adjustable gates for controlling the circulation.

2. A separator comprising a 'funnelshaped outer shell connected at its lower end to a horizontal intake pipe by an elbow; a grindtgmill discharging downwardly into the lower end of the outer shell; a spout exfrom the lower end of the elbow; a gravity swinging valve in the spout; an inner shell concentrically mounted within the outer shell so as to form a chamber between the two'shells; a second take-ofl the inner shell from the the rims; a

spout leading from the lower end of the inner shell downwardly and outwardly through the outer shell; a gravity valve in the second take-off spout; an annular rim extending upwardly from the top of the outer shell; a second annular rim extending from the top of the inner shell, the rims being on a horizontal plane concentric to each other and forming an extension chamber; a cover fitting upon the rims; a bafile extending downwardly from the cover concentric to the rims, there being openings through the inner rim discharging against the baffle; adjustable swinging gates for controlling the openings, the gates all pointing in the same direction; a third take-off spout leading through the outer rim; an adjustable swinging gate for controlling the third take-off spout; a gravity valve in the third take-0E spout; a suction fan having an intake pipe extending downwardly through the center of the cover; and means length of the intake pipe.

In testimony whereof we have signed our names to this specification.

' ERNEST M. DAVIDS.

LYCURGUS LINDSAY.

for adjusting the 

